Ahhh, comedy is such a fickle beast. \D
I'll start with regards to your comic. I do understand what you were going for with 'expressionless' characters vs absurd situations, but one thing instantly popped into mind.
Have you ever heard of the Japanese style of comedy called 'Manzai'? It's a rather popular form of stand-up comedy. Though I know little in detail of it, there's a very important aspect that defines Manzai; a straight man (tsukkomi) and a funny man (boke).
Basically, what makes Manzai work is that while the boke is usually the absurd one who makes the jokes, it's the rationality of the tsukkomi that really makes the outrageousness of the boke stand out.
We can relate to the tsukkomi, because they are supposed to be more like us; normal, logical, sensible human beings. (or something like that \D) And so when we see the tsukkomi get frustrated with the boke, while the boke seems to be completely ignorant of his absurdity, we laugh.
Basically, when all the characters are deadpan, like they are in your comic, it almost feels like the absurdity is natural. That this is what is meant to happen in their world, and if that is so, we don't know how to feel because we don't know how to relate.
But when there's someone there, anyone, who does have expression, who does react in a way us readers may, we sudden remember, "Oh, you're right! This is quite silly! Haha!"
I've rambled on too much (and I'm not sure how coherent my thoughts are X"D), but essentially, I believe you could benefit from introducing a bit of 'rational reaction' into your comic, so that the absurdity of the situation can be greater amplified.
Like the whole "If there is no light, there is no darkness" kinda deal, but less dramatic, ya know? :'D